Grating for jails and prisons



' D. F. YOUNGBLOOD GRATING FOR JA'ILS AND PRISONS Filed April 21, 1926 2 Sheets -Sheet a Patented Dec. 14, 1926.

DAVID FRANKLIN YOUNG-BLOOD, OF SAN ANTONIO, TEXAS.

GRATTNG FOR JAILS AND PRISQNS.

Application filed April 21, .1926.

This invention relates to an improved grating constructed with particular reference to its use in ails, prisons and the like, where special provision should be made to prevent any possibility of prisoners escaping. The object of the invention is to provide grating for the purpose stated with which the greatest security may be attained, a grating which is practical in its construction, well as sanitary, and which may be conveniently built up from individual vertical and horizontal bars.

The specific construction of the invention and the advantages resulting therefrom will be more fully explained in connection with the accompanying drawings, which illustrate the same in its preferred form.

In the drawings:

Figure 1 is a front elevation of a section of grating with the adjacent floor and ceiling shown in section. V

Figure 2 is an enlarged sectional view taken on the line 2--2 of Figure 1.

Figure 3 is a section taken on the line 33 of Figure 2.

Figure 4 is a section taken on the line 41-.4 of Figure 2.

Figure .5 is a section taken on the line 55 of Figure 2.

Figure 6 is a horizontal sectional view illustrating a corner connection.

Figure 7 is a vertical sectional View illustrating means for connecting the grating to a steel ceiling plate.

Figure 8 is a section taken on the line 8-8 of Figure 7.

Figure 9 is a perspective View of a portion of one of the horizontal bars.

As illustrated in the drawings, the grating comprises a series of vertical twin bars 10, each of which is made up of two comparatively large portions 11 connected by a web 12. The enlarged portions 11 may be made round, or of any other suitable shape, and will ordinarily be reinforced by inserts or layers of extremely hard metal, in order to render them tool proof. The web portions 12 of the vertical bars are formed with alined circular openings 13 for receiving horizontal bars 14:, which are round except for a longitudinal bead 15 formed on each bar. Each of the openings 13 is formed with a notch 16, through which the head 15 may pass as the horizontal bar 141 is inserted endwise through the vertical bars.

Serial No. 103,497.

l lotches 17 are out in the head 15 at equidistant points, so that in assembling the bars toform a grating, after the bars 14 are inserted in the vertical bars 10 and the notches 17 come opposite the respective web portions 12, the bars 14 may be partially rotate-cl to lock the vertical bars thereon. Thus, a section of gating of predetermined dimensions may be built up. Usually, such a section will be of proper dimensions to constitute the wall of a cell.

To form a straight line connection between two sections of the grating, a vertical bar is used, which comprises two like sec-. tions 18, each of which is formed with enlarged portions 19 connected by a web 20. The adjacent faces of the sections 18 are vfiat, and a flat locking bar 21 is inserted between them. The locking bar 21 is formed with holes 22, which register with the holes 13 for receiving the abutting ends of the horizontal bars 14', as shown in Figures 3 and 4. The notches 23, however, which are provided for receiving the ends of the beads 15 are'not in registry with the notches 16, but are respectively offset approximately therefrom. The notches 16 are disposed toward the inner side of the cell, and after the bars 14 are inserted in their proper positions with respect to the ends being arranged in abutting relation. 1

The bar sections 18 are then permanently secured together with the locking bar 21 thcrebetween by suitable rivets 2 1.

In making a corner connection, a vertical angle bar 25 is used, as shown in Figure 6. The adjacent vertical bar sections 18 are secured to the respective flanges of the angle bar 25 by rivets 26 or the like, with the flat bars 21 interposed therebetween. When these connections have been made, the locking bars are permanently secured in position, and can not be moved except by completely destroying the gratin The upper and lower ends of the vertical bars may be permanently set in the concrete Floor and ceiling 27, as shown in Figure 1, or, when steel plates 28 are used, they may be secured, as shown in Figures 7 and 8, by means of knees 29. These knees are secured to the steel plate 28 and the web portions 12 of the bars by means of rivets 30, or the like. he vertical portions of the knees 29 are formed so as to fit between the round portions 11 of the bars.

It will be noted that the grating is made up wholly of round bars, so that there is no place for dust to collect, so that the construction, therefore, is sanitary, and there is the least possible obstruction to light and air. "he vertical bars, which are the main factor of security, are made double strength without reducing the space for light and ventilation, and the recessed portion of the interlocking notches isprotected from attack by the twin rounded portions at each side of the web. The vertical and horizontal bars are locked at every intersection. The peculiar shape of the twin bars is such that it is practically impossible to' attack them with a hack saw from the inside of the cell, and the beads 15 are so located that they are practically inaccessible for attack from the inside of the cell. The strength of the vertical twin bars is not materially reduced by the holes provided in the web for receiving the horizontal bars.

Yrhile I have shown and described in detail the preferred form of the invention, it is to be understood that various modifications may be made therein without any material departure from the salient features thereof as set forth in the claims.

ll hat is claimed is:

1. A grating comprising a series of vertical twin bars, each formed with two heavy portions connected by a web, a ser es of round horizontal bars passing through said webs and each having a longitudinal bead, each web having circular. holes for receiving the horizontal bars and formed with a notch at the edge of each hole to permit passage or: the beads when the bars are being assembled,

said beads having equi-distantnotches permit the horizontal bars to be partially rotated to form an interlocl ting connection with the twin bars when the latter are in properly assembled position, a flat bar pern'ianently secured in contact with and covering the outer face of the endmost twin bar and having holes receiving the respective ends of the horizontal bars and provided with notches receiving the end sections of the beads, the notches in said flat bar being offset with respect to the notches in the webs so as to lock the horizontal bars.

2. A grating comprising a series of parallel twin bars, each formed with two heavy portions connected by a web, a series of round bars passing through said webs in perpendicular relation thereto and each having a longitudinal bead, each web having circular holes for receiving the round bars and formed with a notch at the edge of each hole to permit passage of the beads when the bars are being assembled, said beads having equi-distant notches to permit the round bars to be partially rotated to form an interlocking connection with the twin bars w ion the latter are properly assembled, a bar receiving the corresponding ends of the several round bars and divided longi tudinally into two sections with a flat bar secured between them, said flat bar having holes for receiving the ends of the locking bars and provided with notches which are offset from the notches in said webs so as to receive the ends of the beads and lock the round bars, and means for permanently securing said two sections to each other.

3. A grating comprising a series of parallel twin bars, each formed with two heavy portions connected by a web, a series of round bars passing through said webs in per iendicular relation thereto and each having a longitudinal bead, each web having circular holes for receiving the round bars ano formed with a notch at the edge of each hole to permit passage or the beads when the bars are being assembled, said beads having equi-distant notches to permit the round bars to be partially rotated to form an interlocking connection with the twin bars when the latter are assembled, said grating being made in rectangular sections connected together, the connection between them comprising a bar divided longitudinally into two sections with a fiat bar secured between them, said flat bar having holes within whicl'i the ends of the round bars of adjacent grating sections meet, the holes in the flat bars being provided with notches which are offset from the notches in said webs so as to receive the end portions of the beads after the round bars are partially ratated and to lock said round bars, and means for permanently securing the two bar sew tions to each other.

In testimony, that I claim the forego ng as my own, I have hereto aflired my signature.

DAVID FRANKLIN YOUNGBLOOD.

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